Ventilating apparatus



May 24, 1932- l E. M. BASSLER 1,860,068

VENTILATING APPARATUS Filed April 26, 1928 2 Sheets-Sheet 2 ATTORNEY.

Patented May 24, 1932 UNITED STATES PATENT OFFICE EDWIN M. BASSLER, OF WASA'U, WISCONSIN, ASSIGNOR TO D. J. MURRAY MANUFAC- TURING COMPANY, 0F WAUSAU, WISCONSIN, A CORPORATION OF WISCONSIN VENTILATING APPARATUS Application filed April 26,

The invention relates primarily to improvements in cook stove ventilators and has for its object the provision of a simple, compact and efficient attachment for cook stoves, adapted and arranged to eect thorough ventilation thereof and removal of burnt products of combustion and odors of cooking food therefrom` i Another object of the invention is the pro` vision of an improved fan and motor arrangement for such constructions.

' Another object of the invention is to provide an improved fan and motor construction for such installations so arranged that they will occupy a space of minimum size and at the same time, provide means for cooling the motor.

Still. a further object of the invention is to provide a motor driven fan in which the fan and motor are combined in such manner that they may be'assembled in a space of minimum size.

Other objects will appear hereinafter.

The invention consists .in the various features, combinations of features and details of construction hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings showing my improved fan as applied in use' to a Ventilating attachment for a usual form of gasV cook stove and'wliich embodies my-invention as it relates to such attachments; Fig. 5 is a side view of the same; Fig. 6*. is an enlarged sectional view taken through the suction chamber formingpart of the attachment;

1928. Serial No. 273,069.

- Fig. 7 is a section taken, substantially on line 7 7 of Fig. 6; and j Fig. 8 is an enlarged section taken substantially on line 8-8 of Fig. 4.

Describing the invention,in the first instance, as it relates to improvements in motor driven fansvand with particular reference to Figs. 1 and 2, said fan com rises a casing 10 provided with a securing ange 11 adapted and-arranged-to be secured by screws 12 around an opening 13 provided in the back plate 14 of an ordinary gas cook stove, as indicated.

The fan casing 10 is provided with an vopening 15 adapted and arran ed to receive the motor 16, as indicated, sai motor being further secured in said recess by means of screws 17, if desired. The motor 16 is a usual electric motor equipped with a central shaft projecting, as indicated, through the openinfr 13 in the back sheet 14 of the stove.

tecured to the projecting end of the motor shaft 18 is the central hub 19 of a centrlfugal fan of special construction. As shown, said fan is made with inte ral arms 20 and extend into the rim chain er 22 of the fan ca sing 10, and formed on which within said chamber, are vanes or blades 21. The fan blades 21 may have their outer tips or edges 23 bent slightly forwardly to increase their air ropellin action, and the inner edges of sai fan bla es are reinforced by iian es 24,

as shown. By this arrangement as t e fan blades revolve in the direction of the arrows, Fig. 2, air will be drawn throu h the opening 13 into the chamber 22 of t e fan housing by the centrifugal action of the fan blades.

Referring now particularly toFigs. 4 t0 8, the fan casing 10 is provided wlth a tanential air discharge connection 25 to which is attached the lower section 26 of a ventilating flue pipe 27. Said flue pipe is provided with an enlarged suction chamber 28l and the section 26 is provided with an ejector nozzle 29 extending upwardly through the chamber 28, as best shown in Fig. 6.

A branch Ventilating pipe 30 leads, as shown, from the suction chamber 28 into the oven 31 of the stove, said .branch pipe being provided with a damper 32 for obvious puroses. By this-arrangement, as the air 1s orced upwardl through 'the ventilating flue 27, a suction o air isv induced through the branch pipe 30, thereby lthoroughly ventilatinthe oven 31 when the damper 32 is open.

he airv entering the chamber 22 of the fan housing will also serve to cool the motor.

The opening 13 and the fan blades are covered and protected by a dome-shaped, perforated guard plate 33 secured in lace, a8 shown, by means of the screws 12, w 1ch also secure the casing 1() to the back sheet 14.

4 'The shelf 34 is located at a higher level than the openin 13 and is provided with an extension 35 sli ably mounted on guide rods 36, whereby said shelf may be extended over the o en burners of the stove when desired. By t is latter arran ement the products. of combustion arising rom the open heating devices of the stove and odors, as of cooking foods, will be, in asmeasure, trapped by the extension shelf -and therefore more readlly withdrawn by the suction action of the fan, the esca into the room of said products of combustlon and odors-being thereby pre- 'v vented. v By this arrangement a highly eiliclent and compact Ventilating attachment is provided for ordinary gas and other similar stoves. In such constructions, in order to economize space, it is usually desirable to place the stove as close as possible to a wall of the kitchen, the arrangement being such as to mount the electric motor and the coo erating suction fan in the smallest ossib e lateral s ace,

thereby permitting t e positioning o the stove close to a wall of the kitchen, as desired.

While I have illustrated and described the preferred form o f construction for carrying my invention into effect, this is capab e of variation and modification without departing from the s irit of the invention.

I, therefore, do not w1sh to be limited to thel precise details of construction set forth, but desire to avail myself of such variations and skeleton guard enclosing the of the motor shaft and the fan 3. Ventilating apparatus comprising a supporting plate provided with a Ventilating opening; an annular fan casing secured to one side of said late around said opening and provided with) a re-entrant flan' e at the protruding end edge of the ventilating opening an secured to the protruding end of sai shaft and exlade supports.

tending thence into said fan chamber through said openings; and fan blades on said supports and operating in said, fan chamber.

In Witness that I claim `the fore oing as my invention, I afix my signaturev t is 20th day of April A. D. 1928;

EDWIN-M. BASSLER.

y modifications as come within the scope of the ap nded claims. claim:

1. Ventilating apparatus comprising a supporting` plate provided with .a Ventilating opening; a fan-casing secured to one side of said plate around sald opening andpprovided with a central motor space and a surround ing fan chamber having an opening register ingwith said/Ventilating opening; a motor f supported in said motor space with its shaft i plroruding through said plate opening; fan

e su ports secured to the protruding end of said s aft and extending t ence into said fan chamber through said openings; and fan blades on said supports and' operating in said fan chamber.

2. Ventilating apparatus substantially as specified .in claim 1 which also comprises a 

